Turbine-blading machine.



S. Z. DE PERRANTI. TURBINB BLADING MAGHINB.v

APPLICATION FILED FEB.24, 1908.

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ATrEsr S. Z. DE PERRANTI.

TURBINB BLADIN G MACHINE. APPLICATION FILED HBM, 190B.

Patented Sept. 6, 1910.

2 SHEETS-SHEET 2.

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' tail views of the .drawings which form part of f UNITED STATES PATENTOFFICE.

SEBASTIAN ZIANI DE FERRANT'I, 0F IG'llfINDI'JEFORD BRIDGE, NEARSHEFFIELD,

. ENGLAND.

TUBBINE-BLADING MACHINE.

Specification of Letters Patent.

Patented Sept. 6 1910.

Application led February 24, 1908. Serial No. 417,564.

To all whom it may concern:

Be it known that I, SEBASTIAN ZIANI DE' FERRANTI, a subject of the Kingof Great Britainand Ireland, and residing at Grindleford Bridge, nearShefiield, in the county of York, England, have invented certain new anduseful Improvements in Turbine- Bladin Machines, of which the followingis a speci cation. 4 A The invention relates .to the'bladingof turbinesand-has special reference to apparatus for welding turbine blades totheir carrying elements. v

In my' U. Se patent specification, N o.

871,398, I have described different forms oi.l

turbine blade carriers in which the blades are welded 1n place, thevolume of the carrier in the immediate neighborhood of the welding placebeing adjusted to that of the blades by the formation of holes, groovesor the like in thecarrier.

In order to provide as'smooth a path as possible for the working fluidbetween the root ends of the blades so welded in place, I propose tothread each blade through a washer prior to the' welding operation inorder that the holes, grooves or the like in thelearrier may be coveredand the main object of the present invention is to provide a machinesuitable for carrying the operations of washerthreadin and blade-weldinginto effect.

Referring now to the accompanying my ,s ecification, Figure 1 is apartsectional e evation and Fig. 2 is a plan'of a blade arrangement in whicheach blade is threaded through a washer. Fig. 3 showsa part sectionalelevation and Fig. 4 shows a side elevation of a machine forautomatically threading washers on to blades and weldin r same to aturbine blade carrier, while 4ig. -5 shows a pla and Fig. 6 a frontelevation respective |y of the same machine. F ig. 7 shows a ldevelopedplan of the drum carrying the cams'urfaces for reciprocating the weldingslide and the washer magazine. Figs. 8 and 9`show detail views of theshutter for the blade magazine. Figs. 10 and 10*l show demovable stopfor operating the shutter -shown in Figs. 8 4and 9.

In the drawings where deslrable, similar parts are 4denoted by the samereference symbols.

One example of the type of bladed turbine element which my machine isespecially adapted to produce is shown in Figs. l1 and 2, in which theblade carrier,A a, is prepared for welding in accordance with one of theforms ,shown in my patent specification above referred to by the cuttingof circumferential grooves, b. A series of Washers, o, having holesformed to correspond with the shape of the special welding Shanks, e, ofthe blades, d, are also prepared, one to it on each blade shank, theends of these washers being formed as counterparts of in Fig. 2, -sothat when in place they may fit accurately together and form a smoothsurface between the root ends of the blades. The present invent-ionconsists in a welding machine adaptedto produce bladed turbine elementsof the general type above indicated. In carrying the invention intoeilect according to one form, as shown in Fi s. 3 to 10, a slide, q,carrying a magazine, a', or blades is mounted on a base, s, the slidebeing reciprocated on the base by means of a roller, t, which engageswith a cam groove, u, formed on the drum, fv. The drum, fu, is mountedon the shaft, w, which is driven from any convenient source of gearwheel, a2. A bracket, y, is also mounted on the base,'s, and carries arod, 2, the position of which in relation to the bracket canbe'adjustedvby means of the pinching screw,

1. The rod, 2, is adapted on the non-welding stroke of the machine totransfer a blade from the magazine, r, to the welding jaws, 3. Thewelding jaws, 3, are resiliently mounted on the slide, g, by means ofsprings, 4', .the object of which is to maintain aweldmg pressurebetween blade and carrier as the heated parts soft-en under theinfluence of the welding current. The jaws are adapted to be clamped bymeans of the lever, 5, the toe, 6, of which is actuated by theeccentric, 7 and handle 70, operated vby hand in any convenient mannerso as to force the jaws together at the desired times.

A magazine, 8, for washers is slidably mounted on column 9, and isadapted to be l reciprocated vertically by means of a forked lever, 10,rotatably mounted on the lug, l1 and engaging with a pin, 12, on themagazine. The lever, 10, is actuated by a connecting rod, 13, whichreceives its motion from one arm ofa bell'crank lever, 14, rotatablymounted on the base, s. Theother arm of the bell crank lever carries aroller, 15, which 1s power by the caused'to follow the contour of a camsurface, 16, formed on the end of the drum, '11, by means of the spring,

inFig. 7 the short sides ofthe development in their true positionmeeting in a line parallel `to the axis ofthe drum, v.

The. magazine, 8, is provided with an opening, V18, Fig. 3, to allow theentry of the end of a blade which has just been transferred from themagazine, 11, to the welding jaws,

fand the abstraction of a washer when vided for the end of the bladewhen forcingl the washer thereon and when welding I arrange that theshuttershall be actuated so as .primary of the transformer being fed toclose vthe hole leading from the bladev magazine at the correct time andto ecct this result theshut-ter is actuated by a rod, 21, formed asshown in Fig. 8 with a down wardly projectingl pin, 22. The shutter isprevented from moving in one direction by the stop, 23, motion in theother direction taking place against the tension in the spring, 24.

A bar, 25, Fig. 5, is rigidly mounted on one of the columns, 9, andcarries stops, 25, and 27. The stop, 26, having an inclined face, 26, isrigidly secured to the left hand end. (see Fig. 5) of the bar, 25, whilethe stop, 27, `is pivotally connectedat-28 to its right hand end. Thestop, 27, is provided at-its free end (see Figs.v 10 and 10a) with afour-sided lateral projection, 29, having faces, 29, 29h, 29c and l29,and is normally held in the position shown in Fig. 5,.by a spring, 37,which presses its upper face, 38, against the stop, 39, convenientlyformed as a collar on the bracket, 40, to which one end ofthe spring,37,-is secured.-

The welding currenty is brought to the blade from the transformer, T, byway of the secondary lead, LL1, (see Fig..4) one end of which isconnected to the upper jaw, 3rthe o a suitable source of alternatingcurrent, S; the other end of the secondary lead, 41, is

connected to the turbine element, 42, to`

which the blade is to be welded, a controlling p switch being showndiagrammatic'ally at 43.

Theoperation of the machine is as fol lows In the position of themachine asy shown in Fig. 3, a blade has just been transferred from theblade magazine, r, and de-` posited between the welding jaws, and theslide, g, now commences to move outward. As the drum, fu, is rotated -itwill be evident fromthe shape of the cam groove, u, F' 7, that the slideis moved forward some llttle 17. A developed view of the cam groove andsurface is shown` ter,

distance and then retracted, and it is4 during this period that thewasher is threaded on to the bladeend When the slide, g,'is intheposition shown in Fig. 3, the roller, t, is in the position, 30,-Fig. 7,while the roller, 15, which reciprocates 'thewasher-magazine' is in theposition, 30a. The washer magazine will thus be on the point ofdescending to its lowest position corresponding to the position, '31a ofthe roller, 15, in which the discharging orifice of the washer magazinewill be directly opposite to the bladel retained between the weldingjaws.' The position of the roller, t, corresponding to this latterposition is indicated at 31. The portion, 32, of the groove, u, thencauses the slide to'be inc-ved forward through-'the lowermost washer inwhich it is a tightgit. During the initial part of 'this operatic-'n thepin, 22, closes the shutter, 19, by contacting with the faces, 29c and29d, of4

the stop, 27, so that while the washer is being pushed on to .one end'ofthe blade the sov and threads the bladev end. i

33, the roller,15, will be in position when theroller, 15, arrives atthe position, 34, and the relier, t, at 34.' At the I rearward movementof the slide,

19, momentarily opensunder end of the g, the shutter, the influenceofthe spring, 24, as the pin, 22, leaves the face, 29, butas the drum,v, continues its rotation, the slide, g, is moved forward for thewelding operation the shut- 19, momentariiy closing during lthe part ofthis forward movement, as ,the

early pin, 22, passes over the faces, 29-and 29d,-

of the stop, 27. Toward the end of the forward movement of the slide, g,the pin, 22, butts against the inclined face, 'fixed stop, 26, andcloses the shutter, providing an abutment rfor the rear end of thc bladewhile pressurev is exerted bythe springs, 4e, to make the weld. vWhenthe slide, q, arrives at its extreme forward position Fig. 4, `the bladeend will be in contact with the blade carrier, and the current throughthe lead, 41, being switched on, the 'blade will be welded place; Duringthe welding operation the slide, g, remains sta.- tionary the cam groovebeing arranged so that no movement of the roller, t, takes place' whenit moves from the position, 35 to 36. The rearward movementv of theslide now commences and the eccentric roller, 7, bein actuated. so as tounlamp the welded blade thereby- 26, of the :4.

90 pushed on to the blade`f andv the shutter, 19, being opened by thespring, 24, as the pin, 22, passes over the inclined face, 26al of thestop, 2 6, the rod, 2, causes a blade to be transferred from themagazine and deposited between the welding jaws.` The engagement of thepin, 22, with the faces 29, 29h, of the stop, 27, does not affect theposition of the shutter on this stroke'as the stop being movable isdisplaced 'washer-extracting as shown in Fig. v10, without actuation ofthe shutter. At the end-of the rearward stroke the machine .has arrivedin the position shown` in Fig. 3, when the above cycle of operations isrepeated. y

Having thus described my invention what I claim asnew and desire tosecure by Letters Patent isf-""-L v 1. In combination, a turbine bladereceptacle; blade-holding jaws and means for transferring a blade fromsaid receptacle to said jaws, said means` including a'slidable member onwhich said jaws are mounted.

2. In combination, a washer receptacle, blade-holdin jaws and means forreciprocating said receptacle and said jaws in paths transverse to oneanother.

3. In` combination, a turbine blade receptacle; having ,ablade-'ejecting aperturev therein; a washer receptacle having a naperture therein and means for ahnmg said blade-ejecting andwasher-extracting apertures.y

4. In combination, a turbine blade receptacle; a washer receptacle andmeans for moving another.

5. In combination, a lturbine blade receptacle; a washer receptacle andmeans for reciprocatinnr said receptacles.

6. In combination, blade-holding jaws, and a slidable member on whichsaid jaws are flexibly mounted.

7. In combination, a turbine blade receptacle; blade-'holding jaws and acommon slide on which said receptacle and said jaws are mounted.

8. In combination, a turbine blade recepsaid receptacles in relation toone tacle having an aperture therein; a shutter likewise having anyaperture and means for alining said receptacle and said shutterapertures.

' 9. In combination, blade-holding jaws and a blade-abutment membermovably mounted thereon and means' for moving said member transverselyof said jaws.

10. In combination, blade-holding jaws; an apertured shutter mountedthereon and means for threading a blade through said aperture.

11. In combination, blade-holding jaws; a blade-abutment member slidablymounted thereon and means for moving said member transversely of said,jaws.

l2. In combination, a framework having vertical and horizontal guides; aturbine blade receptacle movable in one of said guidescand a washerreceptacle movable in 'the other of said guides..

13. In combination, a turbine blade receptacle; a washer Ireceptacle andmeans for reciprocating said receptacles, said means including a camdrum.

14. In combination a washer receptacle; blade-holding jaws; a slide onwhich said jaws are mounted and means for cyclically reciprocating saidjaws, each cycle including an advance toward said receptacle to thread awasher on a blade, a. withdrawal of the washered blade and a secondadvance.

15. In combination, a washer receptacle; blade-holding jawsandcam-operated means to reciprocate said receptacle and said jaws indierent' paths, said cam-operated means being phased to advance saidjaws to thread a washer on a blade, to Withdraw said washered blade, toremove said receptacleV and to advance said Washered blade.

In testimony whereo, I aiix' my signature lin presence oftwo witnesses.

SEBASTIAN zum DE FERRANTI.

Witnesses:

WALTER ARTHUR EDGAR WooDMAN, WILLIAM DUNCAN DAVIDSON.

